 /*
  * Copyright 2012 The Netty Project
  *
  * The Netty Project licenses this file to you under the Apache License,
  * version 2.0 (the "License"); you may not use this file except in compliance
  * with the License. You may obtain a copy of the License at:
  *
  *   https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  * License for the specific language governing permissions and limitations
  * under the License.
  */
 package io.netty.example.http.websocketx.server;

 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import io.netty.util.CharsetUtil;

 /**
  * Generates the demo HTML page which is served at http://localhost:8080/
  */
 public final class WebSocketServerIndexPage {

     private static final String NEWLINE = "\r\n";

     public static ByteBuf getContent(String webSocketLocation) {
         return Unpooled.copiedBuffer(
                 "<html><head><title>Web Socket Test</title></head>" + NEWLINE +
                         "<body>" + NEWLINE +
                         "<script type=\"text/javascript\">" + NEWLINE +
                         "var socket;" + NEWLINE +
                         "if (!window.WebSocket) {" + NEWLINE +
                         "  window.WebSocket = window.MozWebSocket;" + NEWLINE +
                         '}' + NEWLINE +
                         "if (window.WebSocket) {" + NEWLINE +
                         "  socket = new WebSocket(\"" + webSocketLocation + "\");" + NEWLINE +
                         "  socket.onmessage = function(event) {" + NEWLINE +
                         "    var ta = document.getElementById('responseText');" + NEWLINE +
                         "    ta.value = ta.value + '\\n' + event.data" + NEWLINE +
                         "  };" + NEWLINE +
                         "  socket.onopen = function(event) {" + NEWLINE +
                         "    var ta = document.getElementById('responseText');" + NEWLINE +
                         "    ta.value = \"Web Socket opened!\";" + NEWLINE +
                         "  };" + NEWLINE +
                         "  socket.onclose = function(event) {" + NEWLINE +
                         "    var ta = document.getElementById('responseText');" + NEWLINE +
                         "    ta.value = ta.value + \"Web Socket closed\"; " + NEWLINE +
                         "  };" + NEWLINE +
                         "} else {" + NEWLINE +
                         "  alert(\"Your browser does not support Web Socket.\");" + NEWLINE +
                         '}' + NEWLINE +
                         NEWLINE +
                         "function send(message) {" + NEWLINE +
                         "  if (!window.WebSocket) { return; }" + NEWLINE +
                         "  if (socket.readyState == WebSocket.OPEN) {" + NEWLINE +
                         "    socket.send(message);" + NEWLINE +
                         "  } else {" + NEWLINE +
                         "    alert(\"The socket is not open.\");" + NEWLINE +
                         "  }" + NEWLINE +
                         '}' + NEWLINE +
                         "</script>" + NEWLINE +
                         "<form onsubmit=\"return false;\">" + NEWLINE +
                         "<input type=\"text\" name=\"message\" value=\"Hello, World!\"/>" +
                         "<input type=\"button\" value=\"Send Web Socket Data\"" + NEWLINE +
                         "       onclick=\"send(this.form.message.value)\" />" + NEWLINE +
                         "<h3>Output</h3>" + NEWLINE +
                         "<textarea id=\"responseText\" style=\"width:500px;height:300px;\"></textarea>" + NEWLINE +
                         "</form>" + NEWLINE +
                         "</body>" + NEWLINE +
                         "</html>" + NEWLINE, CharsetUtil.US_ASCII);
     }

     private WebSocketServerIndexPage() {
         // Unused
     }
 }